From: Stephen Boyd <sboyd@kernel.org>
To: Robert Marko <robimarko@gmail.com>,
absahu@codeaurora.org, agross@kernel.org,
bjorn.andersson@linaro.org, linux-arm-msm@vger.kernel.org,
linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org,
mturquette@baylibre.com
Cc: Dirk Buchwalder <buchwalder@posteo.de>,
Robert Marko <robimarko@gmail.com>
Subject: Re: [PATCH] clk: qcom: ipq8074: Use floor ops for SDCC1 clock
Date: Thu, 17 Feb 2022 16:14:36 -0800 [thread overview]
Message-ID: <20220218001439.57B6FC340E8@smtp.kernel.org> (raw)
In-Reply-To: <20220210173100.505128-1-robimarko@gmail.com>
Quoting Robert Marko (2022-02-10 09:31:00)
> From: Dirk Buchwalder <buchwalder@posteo.de>
>
> Use floor ops on SDCC1 APPS clock in order to round down selected clock
> frequency and avoid overclocking SD/eMMC cards.
>
> For example, currently HS200 cards were failling tuning as they were
> actually being clocked at 384MHz instead of 192MHz.
> This caused some boards to disable 1.8V I/O and force the eMMC into the
> standard HS mode (50MHz) and that appeared to work despite the eMMC being
> overclocked to 96Mhz in that case.
>
> There was a previous commit to use floor ops on SDCC clocks, but it looks
> to have only covered SDCC2 clock.
>
> Fixes: 9607f6224b39 ("clk: qcom: ipq8074: add PCIE, USB and SDCC clocks")
>
> Signed-off-by: Dirk Buchwalder <buchwalder@posteo.de>
> Signed-off-by: Robert Marko <robimarko@gmail.com>
> ---
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
next prev parent reply other threads:[~2022-02-18 0:14 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-10 17:31 [PATCH] clk: qcom: ipq8074: Use floor ops for SDCC1 clock Robert Marko
2022-02-18 0:14 ` Stephen Boyd [this message]
2022-02-24 20:50 ` patchwork-bot+linux-arm-msm
2022-02-24 20:54 ` (subset) " Bjorn Andersson
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